In the name of Allah, Most Gracious, Most Merciful
Assalaamu `alaykum waRahmatullahi Wabarakatoh
A law degree or a law career in itself is not prohibited. Yes where the law is abused to usurp others rights or to wrongfully trample on the rights of others- this is not permissible.
The law degree may be pursued to defend the rights of the innocent or to assist others in gaining what is due to them.
Yes, lying, deception and other such ills are prohibited regardless of the career.
And Allah knows best
Mufti Ebrahim Desai
Darul Iftaa, Madrassah In’aamiyyah